Can someone explain the memory leak problem to me

"One other thing u may want to remember clearing out PIE's cached pages/files, this frees up a few megs of program memory, if you use PIE alot.
This can be done by opening PIE, >menu >tools> options > memory tab> and delete files."

Or you could just use Clear Temp and set it to auto clean upon soft reset works like a charm, cache gets full just soft reset and viola